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1da177e4 LT |
1 | VERSION = 2 |
2 | PATCHLEVEL = 6 | |
2664b250 | 3 | SUBLEVEL = 16 |
7705a879 | 4 | EXTRAVERSION = |
df7addbb | 5 | NAME=Sliding Snow Leopard |
1da177e4 LT |
6 | |
7 | # *DOCUMENTATION* | |
8 | # To see a list of typical targets execute "make help" | |
9 | # More info can be located in ./README | |
10 | # Comments in this file are targeted only to the developer, do not | |
11 | # expect to learn how to build the kernel reading this file. | |
12 | ||
13 | # Do not print "Entering directory ..." | |
14 | MAKEFLAGS += --no-print-directory | |
15 | ||
16 | # We are using a recursive build, so we need to do a little thinking | |
17 | # to get the ordering right. | |
18 | # | |
19 | # Most importantly: sub-Makefiles should only ever modify files in | |
20 | # their own directory. If in some directory we have a dependency on | |
21 | # a file in another dir (which doesn't happen often, but it's often | |
22 | # unavoidable when linking the built-in.o targets which finally | |
23 | # turn into vmlinux), we will call a sub make in that other dir, and | |
24 | # after that we are sure that everything which is in that other dir | |
25 | # is now up to date. | |
26 | # | |
27 | # The only cases where we need to modify files which have global | |
28 | # effects are thus separated out and done before the recursive | |
29 | # descending is started. They are now explicitly listed as the | |
30 | # prepare rule. | |
31 | ||
32 | # To put more focus on warnings, be less verbose as default | |
33 | # Use 'make V=1' to see the full commands | |
34 | ||
35 | ifdef V | |
36 | ifeq ("$(origin V)", "command line") | |
37 | KBUILD_VERBOSE = $(V) | |
38 | endif | |
39 | endif | |
40 | ifndef KBUILD_VERBOSE | |
41 | KBUILD_VERBOSE = 0 | |
42 | endif | |
43 | ||
44 | # Call sparse as part of compilation of C files | |
45 | # Use 'make C=1' to enable sparse checking | |
46 | ||
47 | ifdef C | |
48 | ifeq ("$(origin C)", "command line") | |
49 | KBUILD_CHECKSRC = $(C) | |
50 | endif | |
51 | endif | |
52 | ifndef KBUILD_CHECKSRC | |
53 | KBUILD_CHECKSRC = 0 | |
54 | endif | |
55 | ||
56 | # Use make M=dir to specify directory of external module to build | |
57 | # Old syntax make ... SUBDIRS=$PWD is still supported | |
58 | # Setting the environment variable KBUILD_EXTMOD take precedence | |
59 | ifdef SUBDIRS | |
60 | KBUILD_EXTMOD ?= $(SUBDIRS) | |
61 | endif | |
62 | ifdef M | |
63 | ifeq ("$(origin M)", "command line") | |
64 | KBUILD_EXTMOD := $(M) | |
65 | endif | |
66 | endif | |
67 | ||
68 | ||
69 | # kbuild supports saving output files in a separate directory. | |
70 | # To locate output files in a separate directory two syntaxes are supported. | |
71 | # In both cases the working directory must be the root of the kernel src. | |
72 | # 1) O= | |
73 | # Use "make O=dir/to/store/output/files/" | |
74 | # | |
75 | # 2) Set KBUILD_OUTPUT | |
76 | # Set the environment variable KBUILD_OUTPUT to point to the directory | |
77 | # where the output files shall be placed. | |
78 | # export KBUILD_OUTPUT=dir/to/store/output/files/ | |
79 | # make | |
80 | # | |
81 | # The O= assignment takes precedence over the KBUILD_OUTPUT environment | |
82 | # variable. | |
83 | ||
84 | ||
85 | # KBUILD_SRC is set on invocation of make in OBJ directory | |
86 | # KBUILD_SRC is not intended to be used by the regular user (for now) | |
87 | ifeq ($(KBUILD_SRC),) | |
88 | ||
89 | # OK, Make called in directory where kernel src resides | |
90 | # Do we want to locate output files in a separate directory? | |
91 | ifdef O | |
92 | ifeq ("$(origin O)", "command line") | |
93 | KBUILD_OUTPUT := $(O) | |
94 | endif | |
95 | endif | |
96 | ||
97 | # That's our default target when none is given on the command line | |
98 | .PHONY: _all | |
99 | _all: | |
100 | ||
101 | ifneq ($(KBUILD_OUTPUT),) | |
102 | # Invoke a second make in the output directory, passing relevant variables | |
103 | # check that the output directory actually exists | |
104 | saved-output := $(KBUILD_OUTPUT) | |
105 | KBUILD_OUTPUT := $(shell cd $(KBUILD_OUTPUT) && /bin/pwd) | |
106 | $(if $(KBUILD_OUTPUT),, \ | |
107 | $(error output directory "$(saved-output)" does not exist)) | |
108 | ||
36cbbe5e | 109 | .PHONY: $(MAKECMDGOALS) |
1da177e4 | 110 | |
36cbbe5e | 111 | $(filter-out _all,$(MAKECMDGOALS)) _all: |
23a45e2c SR |
112 | $(if $(KBUILD_VERBOSE:1=),@)$(MAKE) -C $(KBUILD_OUTPUT) \ |
113 | KBUILD_SRC=$(CURDIR) \ | |
36cbbe5e | 114 | KBUILD_EXTMOD="$(KBUILD_EXTMOD)" -f $(CURDIR)/Makefile $@ |
1da177e4 LT |
115 | |
116 | # Leave processing to above invocation of make | |
117 | skip-makefile := 1 | |
118 | endif # ifneq ($(KBUILD_OUTPUT),) | |
119 | endif # ifeq ($(KBUILD_SRC),) | |
120 | ||
121 | # We process the rest of the Makefile if this is the final invocation of make | |
122 | ifeq ($(skip-makefile),) | |
123 | ||
124 | # If building an external module we do not care about the all: rule | |
125 | # but instead _all depend on modules | |
126 | .PHONY: all | |
127 | ifeq ($(KBUILD_EXTMOD),) | |
128 | _all: all | |
129 | else | |
130 | _all: modules | |
131 | endif | |
132 | ||
133 | srctree := $(if $(KBUILD_SRC),$(KBUILD_SRC),$(CURDIR)) | |
134 | TOPDIR := $(srctree) | |
135 | # FIXME - TOPDIR is obsolete, use srctree/objtree | |
136 | objtree := $(CURDIR) | |
137 | src := $(srctree) | |
138 | obj := $(objtree) | |
139 | ||
140 | VPATH := $(srctree) | |
141 | ||
142 | export srctree objtree VPATH TOPDIR | |
143 | ||
1da177e4 LT |
144 | |
145 | # SUBARCH tells the usermode build what the underlying arch is. That is set | |
146 | # first, and if a usermode build is happening, the "ARCH=um" on the command | |
147 | # line overrides the setting of ARCH below. If a native build is happening, | |
148 | # then ARCH is assigned, getting whatever value it gets normally, and | |
149 | # SUBARCH is subsequently ignored. | |
150 | ||
151 | SUBARCH := $(shell uname -m | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \ | |
152 | -e s/arm.*/arm/ -e s/sa110/arm/ \ | |
39990b5e | 153 | -e s/s390x/s390/ -e s/parisc64/parisc/ \ |
820a8ce7 | 154 | -e s/ppc.*/powerpc/ ) |
1da177e4 LT |
155 | |
156 | # Cross compiling and selecting different set of gcc/bin-utils | |
157 | # --------------------------------------------------------------------------- | |
158 | # | |
159 | # When performing cross compilation for other architectures ARCH shall be set | |
160 | # to the target architecture. (See arch/* for the possibilities). | |
161 | # ARCH can be set during invocation of make: | |
162 | # make ARCH=ia64 | |
163 | # Another way is to have ARCH set in the environment. | |
164 | # The default ARCH is the host where make is executed. | |
165 | ||
166 | # CROSS_COMPILE specify the prefix used for all executables used | |
167 | # during compilation. Only gcc and related bin-utils executables | |
168 | # are prefixed with $(CROSS_COMPILE). | |
169 | # CROSS_COMPILE can be set on the command line | |
170 | # make CROSS_COMPILE=ia64-linux- | |
171 | # Alternatively CROSS_COMPILE can be set in the environment. | |
172 | # Default value for CROSS_COMPILE is not to prefix executables | |
173 | # Note: Some architectures assign CROSS_COMPILE in their arch/*/Makefile | |
174 | ||
175 | ARCH ?= $(SUBARCH) | |
176 | CROSS_COMPILE ?= | |
177 | ||
178 | # Architecture as present in compile.h | |
179 | UTS_MACHINE := $(ARCH) | |
180 | ||
181 | # SHELL used by kbuild | |
182 | CONFIG_SHELL := $(shell if [ -x "$$BASH" ]; then echo $$BASH; \ | |
183 | else if [ -x /bin/bash ]; then echo /bin/bash; \ | |
184 | else echo sh; fi ; fi) | |
185 | ||
186 | HOSTCC = gcc | |
187 | HOSTCXX = g++ | |
188 | HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer | |
189 | HOSTCXXFLAGS = -O2 | |
190 | ||
191 | # Decide whether to build built-in, modular, or both. | |
192 | # Normally, just do built-in. | |
193 | ||
194 | KBUILD_MODULES := | |
195 | KBUILD_BUILTIN := 1 | |
196 | ||
197 | # If we have only "make modules", don't compile built-in objects. | |
198 | # When we're building modules with modversions, we need to consider | |
199 | # the built-in objects during the descend as well, in order to | |
200 | # make sure the checksums are uptodate before we record them. | |
201 | ||
202 | ifeq ($(MAKECMDGOALS),modules) | |
203 | KBUILD_BUILTIN := $(if $(CONFIG_MODVERSIONS),1) | |
204 | endif | |
205 | ||
206 | # If we have "make <whatever> modules", compile modules | |
207 | # in addition to whatever we do anyway. | |
208 | # Just "make" or "make all" shall build modules as well | |
209 | ||
210 | ifneq ($(filter all _all modules,$(MAKECMDGOALS)),) | |
211 | KBUILD_MODULES := 1 | |
212 | endif | |
213 | ||
214 | ifeq ($(MAKECMDGOALS),) | |
215 | KBUILD_MODULES := 1 | |
216 | endif | |
217 | ||
e579d351 | 218 | export KBUILD_MODULES KBUILD_BUILTIN |
1da177e4 LT |
219 | export KBUILD_CHECKSRC KBUILD_SRC KBUILD_EXTMOD |
220 | ||
221 | # Beautify output | |
222 | # --------------------------------------------------------------------------- | |
223 | # | |
224 | # Normally, we echo the whole command before executing it. By making | |
225 | # that echo $($(quiet)$(cmd)), we now have the possibility to set | |
226 | # $(quiet) to choose other forms of output instead, e.g. | |
227 | # | |
228 | # quiet_cmd_cc_o_c = Compiling $(RELDIR)/$@ | |
229 | # cmd_cc_o_c = $(CC) $(c_flags) -c -o $@ $< | |
230 | # | |
231 | # If $(quiet) is empty, the whole command will be printed. | |
232 | # If it is set to "quiet_", only the short version will be printed. | |
233 | # If it is set to "silent_", nothing wil be printed at all, since | |
234 | # the variable $(silent_cmd_cc_o_c) doesn't exist. | |
235 | # | |
a58a414f | 236 | # A simple variant is to prefix commands with $(Q) - that's useful |
1da177e4 LT |
237 | # for commands that shall be hidden in non-verbose mode. |
238 | # | |
239 | # $(Q)ln $@ :< | |
240 | # | |
241 | # If KBUILD_VERBOSE equals 0 then the above command will be hidden. | |
242 | # If KBUILD_VERBOSE equals 1 then the above command is displayed. | |
243 | ||
244 | ifeq ($(KBUILD_VERBOSE),1) | |
245 | quiet = | |
246 | Q = | |
247 | else | |
248 | quiet=quiet_ | |
249 | Q = @ | |
250 | endif | |
251 | ||
252 | # If the user is running make -s (silent mode), suppress echoing of | |
253 | # commands | |
254 | ||
255 | ifneq ($(findstring s,$(MAKEFLAGS)),) | |
256 | quiet=silent_ | |
257 | endif | |
258 | ||
259 | export quiet Q KBUILD_VERBOSE | |
260 | ||
261 | ###### | |
262 | # cc support functions to be used (only) in arch/$(ARCH)/Makefile | |
263 | # See documentation in Documentation/kbuild/makefiles.txt | |
264 | ||
cad82448 PM |
265 | # as-option |
266 | # Usage: cflags-y += $(call as-option, -Wa$(comma)-isa=foo,) | |
267 | ||
268 | as-option = $(shell if $(CC) $(CFLAGS) $(1) -Wa,-Z -c -o /dev/null \ | |
269 | -xassembler /dev/null > /dev/null 2>&1; then echo "$(1)"; \ | |
270 | else echo "$(2)"; fi ;) | |
271 | ||
1da177e4 | 272 | # cc-option |
ae67cd64 | 273 | # Usage: cflags-y += $(call cc-option, -march=winchip-c6, -march=i586) |
1da177e4 LT |
274 | |
275 | cc-option = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ | |
276 | > /dev/null 2>&1; then echo "$(1)"; else echo "$(2)"; fi ;) | |
277 | ||
1da177e4 LT |
278 | # cc-option-yn |
279 | # Usage: flag := $(call cc-option-yn, -march=winchip-c6) | |
280 | cc-option-yn = $(shell if $(CC) $(CFLAGS) $(1) -S -o /dev/null -xc /dev/null \ | |
281 | > /dev/null 2>&1; then echo "y"; else echo "n"; fi;) | |
282 | ||
283 | # cc-option-align | |
284 | # Prefix align with either -falign or -malign | |
285 | cc-option-align = $(subst -functions=0,,\ | |
286 | $(call cc-option,-falign-functions=0,-malign-functions=0)) | |
287 | ||
288 | # cc-version | |
289 | # Usage gcc-ver := $(call cc-version $(CC)) | |
290 | cc-version = $(shell $(CONFIG_SHELL) $(srctree)/scripts/gcc-version.sh \ | |
291 | $(if $(1), $(1), $(CC))) | |
292 | ||
293 | ||
294 | # Look for make include files relative to root of kernel src | |
295 | MAKEFLAGS += --include-dir=$(srctree) | |
296 | ||
8ec4b4ff | 297 | # We need some generic definitions |
2a691470 | 298 | include $(srctree)/scripts/Kbuild.include |
8ec4b4ff | 299 | |
1da177e4 LT |
300 | # For maximum performance (+ possibly random breakage, uncomment |
301 | # the following) | |
302 | ||
303 | #MAKEFLAGS += -rR | |
304 | ||
305 | # Make variables (CC, etc...) | |
306 | ||
307 | AS = $(CROSS_COMPILE)as | |
308 | LD = $(CROSS_COMPILE)ld | |
309 | CC = $(CROSS_COMPILE)gcc | |
310 | CPP = $(CC) -E | |
311 | AR = $(CROSS_COMPILE)ar | |
312 | NM = $(CROSS_COMPILE)nm | |
313 | STRIP = $(CROSS_COMPILE)strip | |
314 | OBJCOPY = $(CROSS_COMPILE)objcopy | |
315 | OBJDUMP = $(CROSS_COMPILE)objdump | |
316 | AWK = awk | |
317 | GENKSYMS = scripts/genksyms/genksyms | |
318 | DEPMOD = /sbin/depmod | |
319 | KALLSYMS = scripts/kallsyms | |
320 | PERL = perl | |
321 | CHECK = sparse | |
322 | ||
af4ca457 | 323 | CHECKFLAGS := -D__linux__ -Dlinux -D__STDC__ -Dunix -D__unix__ -Wbitwise $(CF) |
1da177e4 LT |
324 | MODFLAGS = -DMODULE |
325 | CFLAGS_MODULE = $(MODFLAGS) | |
326 | AFLAGS_MODULE = $(MODFLAGS) | |
327 | LDFLAGS_MODULE = -r | |
328 | CFLAGS_KERNEL = | |
329 | AFLAGS_KERNEL = | |
330 | ||
331 | ||
332 | # Use LINUXINCLUDE when you must reference the include/ directory. | |
333 | # Needed to be compatible with the O= option | |
334 | LINUXINCLUDE := -Iinclude \ | |
2dd34b48 | 335 | $(if $(KBUILD_SRC),-Iinclude2 -I$(srctree)/include) \ |
e623a3b8 | 336 | -include include/linux/autoconf.h |
1da177e4 LT |
337 | |
338 | CPPFLAGS := -D__KERNEL__ $(LINUXINCLUDE) | |
339 | ||
3c521e06 | 340 | CFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \ |
1da177e4 LT |
341 | -fno-strict-aliasing -fno-common \ |
342 | -ffreestanding | |
343 | AFLAGS := -D__ASSEMBLY__ | |
344 | ||
cb58455c SR |
345 | # Read KERNELRELEASE from .kernelrelease (if it exists) |
346 | KERNELRELEASE = $(shell cat .kernelrelease 2> /dev/null) | |
2244cbd8 | 347 | KERNELVERSION = $(VERSION).$(PATCHLEVEL).$(SUBLEVEL)$(EXTRAVERSION) |
cb58455c | 348 | |
2244cbd8 | 349 | export VERSION PATCHLEVEL SUBLEVEL KERNELRELEASE KERNELVERSION \ |
1da177e4 LT |
350 | ARCH CONFIG_SHELL HOSTCC HOSTCFLAGS CROSS_COMPILE AS LD CC \ |
351 | CPP AR NM STRIP OBJCOPY OBJDUMP MAKE AWK GENKSYMS PERL UTS_MACHINE \ | |
352 | HOSTCXX HOSTCXXFLAGS LDFLAGS_MODULE CHECK CHECKFLAGS | |
353 | ||
354 | export CPPFLAGS NOSTDINC_FLAGS LINUXINCLUDE OBJCOPYFLAGS LDFLAGS | |
355 | export CFLAGS CFLAGS_KERNEL CFLAGS_MODULE | |
356 | export AFLAGS AFLAGS_KERNEL AFLAGS_MODULE | |
357 | ||
358 | # When compiling out-of-tree modules, put MODVERDIR in the module | |
359 | # tree rather than in the kernel tree. The kernel tree might | |
360 | # even be read-only. | |
361 | export MODVERDIR := $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_versions | |
362 | ||
1da177e4 LT |
363 | # Files to ignore in find ... statements |
364 | ||
406119f4 TM |
365 | RCS_FIND_IGNORE := \( -name SCCS -o -name BitKeeper -o -name .svn -o -name CVS -o -name .pc -o -name .hg -o -name .git \) -prune -o |
366 | export RCS_TAR_IGNORE := --exclude SCCS --exclude BitKeeper --exclude .svn --exclude CVS --exclude .pc --exclude .hg --exclude .git | |
1da177e4 LT |
367 | |
368 | # =========================================================================== | |
369 | # Rules shared between *config targets and build targets | |
370 | ||
371 | # Basic helpers built in scripts/ | |
372 | .PHONY: scripts_basic | |
373 | scripts_basic: | |
374 | $(Q)$(MAKE) $(build)=scripts/basic | |
375 | ||
cd05e6bd JB |
376 | # To avoid any implicit rule to kick in, define an empty command. |
377 | scripts/basic/%: scripts_basic ; | |
378 | ||
1da177e4 LT |
379 | .PHONY: outputmakefile |
380 | # outputmakefile generate a Makefile to be placed in output directory, if | |
381 | # using a seperate output directory. This allows convinient use | |
382 | # of make in output directory | |
383 | outputmakefile: | |
384 | $(Q)if test ! $(srctree) -ef $(objtree); then \ | |
385 | $(CONFIG_SHELL) $(srctree)/scripts/mkmakefile \ | |
386 | $(srctree) $(objtree) $(VERSION) $(PATCHLEVEL) \ | |
387 | > $(objtree)/Makefile; \ | |
388 | echo ' GEN $(objtree)/Makefile'; \ | |
389 | fi | |
390 | ||
391 | # To make sure we do not include .config for any of the *config targets | |
392 | # catch them early, and hand them over to scripts/kconfig/Makefile | |
393 | # It is allowed to specify more targets when calling make, including | |
394 | # mixing *config targets and build targets. | |
395 | # For example 'make oldconfig all'. | |
396 | # Detect when mixed targets is specified, and make a second invocation | |
397 | # of make so .config is not included in this case either (for *config). | |
398 | ||
399 | no-dot-config-targets := clean mrproper distclean \ | |
6b6a462c | 400 | cscope TAGS tags help %docs check% |
1da177e4 LT |
401 | |
402 | config-targets := 0 | |
403 | mixed-targets := 0 | |
404 | dot-config := 1 | |
405 | ||
406 | ifneq ($(filter $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
407 | ifeq ($(filter-out $(no-dot-config-targets), $(MAKECMDGOALS)),) | |
408 | dot-config := 0 | |
409 | endif | |
410 | endif | |
411 | ||
412 | ifeq ($(KBUILD_EXTMOD),) | |
413 | ifneq ($(filter config %config,$(MAKECMDGOALS)),) | |
414 | config-targets := 1 | |
415 | ifneq ($(filter-out config %config,$(MAKECMDGOALS)),) | |
416 | mixed-targets := 1 | |
417 | endif | |
418 | endif | |
419 | endif | |
420 | ||
421 | ifeq ($(mixed-targets),1) | |
422 | # =========================================================================== | |
423 | # We're called with mixed targets (*config and build targets). | |
424 | # Handle them one by one. | |
425 | ||
426 | %:: FORCE | |
427 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= $@ | |
428 | ||
429 | else | |
430 | ifeq ($(config-targets),1) | |
431 | # =========================================================================== | |
432 | # *config targets only - make sure prerequisites are updated, and descend | |
433 | # in scripts/kconfig to make the *config target | |
434 | ||
435 | # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed. | |
436 | # KBUILD_DEFCONFIG may point out an alternative default configuration | |
437 | # used for 'make defconfig' | |
438 | include $(srctree)/arch/$(ARCH)/Makefile | |
439 | export KBUILD_DEFCONFIG | |
440 | ||
cd05e6bd JB |
441 | config %config: scripts_basic outputmakefile FORCE |
442 | $(Q)mkdir -p include/linux | |
1da177e4 | 443 | $(Q)$(MAKE) $(build)=scripts/kconfig $@ |
8c7f75d3 | 444 | $(Q)$(MAKE) -C $(srctree) KBUILD_SRC= .kernelrelease |
1da177e4 LT |
445 | |
446 | else | |
447 | # =========================================================================== | |
448 | # Build targets only - this includes vmlinux, arch specific targets, clean | |
449 | # targets and others. In general all targets except *config targets. | |
450 | ||
451 | ifeq ($(KBUILD_EXTMOD),) | |
452 | # Additional helpers built in scripts/ | |
453 | # Carefully list dependencies so we do not try to build scripts twice | |
454 | # in parrallel | |
455 | .PHONY: scripts | |
456 | scripts: scripts_basic include/config/MARKER | |
457 | $(Q)$(MAKE) $(build)=$(@) | |
458 | ||
459 | scripts_basic: include/linux/autoconf.h | |
460 | ||
461 | # Objects we will link into vmlinux / subdirs we need to visit | |
462 | init-y := init/ | |
463 | drivers-y := drivers/ sound/ | |
464 | net-y := net/ | |
465 | libs-y := lib/ | |
466 | core-y := usr/ | |
467 | endif # KBUILD_EXTMOD | |
468 | ||
469 | ifeq ($(dot-config),1) | |
470 | # In this section, we need .config | |
471 | ||
472 | # Read in dependencies to all Kconfig* files, make sure to run | |
473 | # oldconfig if changes are detected. | |
752625cf | 474 | -include .kconfig.d |
1da177e4 LT |
475 | |
476 | include .config | |
477 | ||
478 | # If .config needs to be updated, it will be done via the dependency | |
479 | # that autoconf has on .config. | |
480 | # To avoid any implicit rule to kick in, define an empty command | |
752625cf | 481 | .config .kconfig.d: ; |
1da177e4 LT |
482 | |
483 | # If .config is newer than include/linux/autoconf.h, someone tinkered | |
752625cf SR |
484 | # with it and forgot to run make oldconfig. |
485 | # If kconfig.d is missing then we are probarly in a cleaned tree so | |
486 | # we execute the config step to be sure to catch updated Kconfig files | |
487 | include/linux/autoconf.h: .kconfig.d .config | |
5011cdd0 | 488 | $(Q)mkdir -p include/linux |
1da177e4 LT |
489 | $(Q)$(MAKE) -f $(srctree)/Makefile silentoldconfig |
490 | else | |
491 | # Dummy target needed, because used as prerequisite | |
492 | include/linux/autoconf.h: ; | |
493 | endif | |
494 | ||
495 | # The all: target is the default when no target is given on the | |
496 | # command line. | |
497 | # This allow a user to issue only 'make' to build a kernel including modules | |
498 | # Defaults vmlinux but it is usually overriden in the arch makefile | |
499 | all: vmlinux | |
500 | ||
501 | ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE | |
502 | CFLAGS += -Os | |
503 | else | |
504 | CFLAGS += -O2 | |
505 | endif | |
506 | ||
507 | #Add align options if CONFIG_CC_* is not equal to 0 | |
508 | add-align = $(if $(filter-out 0,$($(1))),$(cc-option-align)$(2)=$($(1))) | |
509 | CFLAGS += $(call add-align,CONFIG_CC_ALIGN_FUNCTIONS,-functions) | |
510 | CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LABELS,-labels) | |
511 | CFLAGS += $(call add-align,CONFIG_CC_ALIGN_LOOPS,-loops) | |
512 | CFLAGS += $(call add-align,CONFIG_CC_ALIGN_JUMPS,-jumps) | |
513 | ||
514 | ifdef CONFIG_FRAME_POINTER | |
0030cbf0 | 515 | CFLAGS += -fno-omit-frame-pointer $(call cc-option,-fno-optimize-sibling-calls,) |
1da177e4 LT |
516 | else |
517 | CFLAGS += -fomit-frame-pointer | |
518 | endif | |
519 | ||
604bf5a2 JB |
520 | ifdef CONFIG_UNWIND_INFO |
521 | CFLAGS += -fasynchronous-unwind-tables | |
522 | endif | |
523 | ||
1da177e4 LT |
524 | ifdef CONFIG_DEBUG_INFO |
525 | CFLAGS += -g | |
526 | endif | |
527 | ||
528 | include $(srctree)/arch/$(ARCH)/Makefile | |
529 | ||
e8e69931 | 530 | # arch Makefile may override CC so keep this after arch Makefile is included |
e8f5bdb0 | 531 | NOSTDINC_FLAGS += -nostdinc -isystem $(shell $(CC) -print-file-name=include) |
e8e69931 SR |
532 | CHECKFLAGS += $(NOSTDINC_FLAGS) |
533 | ||
1da177e4 LT |
534 | # warn about C99 declaration after statement |
535 | CFLAGS += $(call cc-option,-Wdeclaration-after-statement,) | |
536 | ||
537 | # disable pointer signedness warnings in gcc 4.0 | |
538 | CFLAGS += $(call cc-option,-Wno-pointer-sign,) | |
539 | ||
540 | # Default kernel image to build when no specific target is given. | |
541 | # KBUILD_IMAGE may be overruled on the commandline or | |
542 | # set in the environment | |
543 | # Also any assignments in arch/$(ARCH)/Makefile take precedence over | |
544 | # this default value | |
545 | export KBUILD_IMAGE ?= vmlinux | |
546 | ||
547 | # | |
548 | # INSTALL_PATH specifies where to place the updated kernel and system map | |
549 | # images. Default is /boot, but you can set it to other values | |
550 | export INSTALL_PATH ?= /boot | |
551 | ||
552 | # | |
553 | # INSTALL_MOD_PATH specifies a prefix to MODLIB for module directory | |
554 | # relocations required by build roots. This is not defined in the | |
555 | # makefile but the arguement can be passed to make if needed. | |
556 | # | |
557 | ||
df9df036 | 558 | MODLIB = $(INSTALL_MOD_PATH)/lib/modules/$(KERNELRELEASE) |
1da177e4 LT |
559 | export MODLIB |
560 | ||
561 | ||
562 | ifeq ($(KBUILD_EXTMOD),) | |
3a65dfe8 | 563 | core-y += kernel/ mm/ fs/ ipc/ security/ crypto/ block/ |
1da177e4 LT |
564 | |
565 | vmlinux-dirs := $(patsubst %/,%,$(filter %/, $(init-y) $(init-m) \ | |
566 | $(core-y) $(core-m) $(drivers-y) $(drivers-m) \ | |
567 | $(net-y) $(net-m) $(libs-y) $(libs-m))) | |
568 | ||
569 | vmlinux-alldirs := $(sort $(vmlinux-dirs) $(patsubst %/,%,$(filter %/, \ | |
570 | $(init-n) $(init-) \ | |
571 | $(core-n) $(core-) $(drivers-n) $(drivers-) \ | |
572 | $(net-n) $(net-) $(libs-n) $(libs-)))) | |
573 | ||
574 | init-y := $(patsubst %/, %/built-in.o, $(init-y)) | |
575 | core-y := $(patsubst %/, %/built-in.o, $(core-y)) | |
576 | drivers-y := $(patsubst %/, %/built-in.o, $(drivers-y)) | |
577 | net-y := $(patsubst %/, %/built-in.o, $(net-y)) | |
578 | libs-y1 := $(patsubst %/, %/lib.a, $(libs-y)) | |
579 | libs-y2 := $(patsubst %/, %/built-in.o, $(libs-y)) | |
580 | libs-y := $(libs-y1) $(libs-y2) | |
581 | ||
582 | # Build vmlinux | |
583 | # --------------------------------------------------------------------------- | |
584 | # vmlinux is build from the objects selected by $(vmlinux-init) and | |
585 | # $(vmlinux-main). Most are built-in.o files from top-level directories | |
586 | # in the kernel tree, others are specified in arch/$(ARCH)Makefile. | |
587 | # Ordering when linking is important, and $(vmlinux-init) must be first. | |
588 | # | |
589 | # vmlinux | |
590 | # ^ | |
591 | # | | |
592 | # +-< $(vmlinux-init) | |
593 | # | +--< init/version.o + more | |
594 | # | | |
595 | # +--< $(vmlinux-main) | |
596 | # | +--< driver/built-in.o mm/built-in.o + more | |
597 | # | | |
598 | # +-< kallsyms.o (see description in CONFIG_KALLSYMS section) | |
599 | # | |
600 | # vmlinux version (uname -v) cannot be updated during normal | |
601 | # descending-into-subdirs phase since we do not yet know if we need to | |
602 | # update vmlinux. | |
603 | # Therefore this step is delayed until just before final link of vmlinux - | |
604 | # except in the kallsyms case where it is done just before adding the | |
605 | # symbols to the kernel. | |
606 | # | |
607 | # System.map is generated to document addresses of all kernel symbols | |
608 | ||
609 | vmlinux-init := $(head-y) $(init-y) | |
610 | vmlinux-main := $(core-y) $(libs-y) $(drivers-y) $(net-y) | |
611 | vmlinux-all := $(vmlinux-init) $(vmlinux-main) | |
612 | vmlinux-lds := arch/$(ARCH)/kernel/vmlinux.lds | |
613 | ||
614 | # Rule to link vmlinux - also used during CONFIG_KALLSYMS | |
615 | # May be overridden by arch/$(ARCH)/Makefile | |
616 | quiet_cmd_vmlinux__ ?= LD $@ | |
617 | cmd_vmlinux__ ?= $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) -o $@ \ | |
618 | -T $(vmlinux-lds) $(vmlinux-init) \ | |
619 | --start-group $(vmlinux-main) --end-group \ | |
620 | $(filter-out $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) FORCE ,$^) | |
621 | ||
622 | # Generate new vmlinux version | |
623 | quiet_cmd_vmlinux_version = GEN .version | |
624 | cmd_vmlinux_version = set -e; \ | |
4e25d8bb JB |
625 | if [ ! -r .version ]; then \ |
626 | rm -f .version; \ | |
627 | echo 1 >.version; \ | |
628 | else \ | |
629 | mv .version .old_version; \ | |
630 | expr 0$$(cat .old_version) + 1 >.version; \ | |
631 | fi; \ | |
1da177e4 LT |
632 | $(MAKE) $(build)=init |
633 | ||
634 | # Generate System.map | |
635 | quiet_cmd_sysmap = SYSMAP | |
636 | cmd_sysmap = $(CONFIG_SHELL) $(srctree)/scripts/mksysmap | |
637 | ||
638 | # Link of vmlinux | |
639 | # If CONFIG_KALLSYMS is set .version is already updated | |
640 | # Generate System.map and verify that the content is consistent | |
39ca371c MR |
641 | # Use + in front of the vmlinux_version rule to silent warning with make -j2 |
642 | # First command is ':' to allow us to use + in front of the rule | |
1da177e4 | 643 | define rule_vmlinux__ |
39ca371c | 644 | : |
1da177e4 LT |
645 | $(if $(CONFIG_KALLSYMS),,+$(call cmd,vmlinux_version)) |
646 | ||
647 | $(call cmd,vmlinux__) | |
648 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd | |
649 | ||
650 | $(Q)$(if $($(quiet)cmd_sysmap), \ | |
651 | echo ' $($(quiet)cmd_sysmap) System.map' &&) \ | |
652 | $(cmd_sysmap) $@ System.map; \ | |
653 | if [ $$? -ne 0 ]; then \ | |
654 | rm -f $@; \ | |
655 | /bin/false; \ | |
656 | fi; | |
657 | $(verify_kallsyms) | |
658 | endef | |
659 | ||
660 | ||
661 | ifdef CONFIG_KALLSYMS | |
662 | # Generate section listing all symbols and add it into vmlinux $(kallsyms.o) | |
663 | # It's a three stage process: | |
664 | # o .tmp_vmlinux1 has all symbols and sections, but __kallsyms is | |
665 | # empty | |
666 | # Running kallsyms on that gives us .tmp_kallsyms1.o with | |
667 | # the right size - vmlinux version (uname -v) is updated during this step | |
668 | # o .tmp_vmlinux2 now has a __kallsyms section of the right size, | |
669 | # but due to the added section, some addresses have shifted. | |
670 | # From here, we generate a correct .tmp_kallsyms2.o | |
671 | # o The correct .tmp_kallsyms2.o is linked into the final vmlinux. | |
672 | # o Verify that the System.map from vmlinux matches the map from | |
673 | # .tmp_vmlinux2, just in case we did not generate kallsyms correctly. | |
674 | # o If CONFIG_KALLSYMS_EXTRA_PASS is set, do an extra pass using | |
675 | # .tmp_vmlinux3 and .tmp_kallsyms3.o. This is only meant as a | |
676 | # temporary bypass to allow the kernel to be built while the | |
677 | # maintainers work out what went wrong with kallsyms. | |
678 | ||
679 | ifdef CONFIG_KALLSYMS_EXTRA_PASS | |
680 | last_kallsyms := 3 | |
681 | else | |
682 | last_kallsyms := 2 | |
683 | endif | |
684 | ||
685 | kallsyms.o := .tmp_kallsyms$(last_kallsyms).o | |
686 | ||
687 | define verify_kallsyms | |
688 | $(Q)$(if $($(quiet)cmd_sysmap), \ | |
689 | echo ' $($(quiet)cmd_sysmap) .tmp_System.map' &&) \ | |
690 | $(cmd_sysmap) .tmp_vmlinux$(last_kallsyms) .tmp_System.map | |
691 | $(Q)cmp -s System.map .tmp_System.map || \ | |
692 | (echo Inconsistent kallsyms data; \ | |
693 | echo Try setting CONFIG_KALLSYMS_EXTRA_PASS; \ | |
694 | rm .tmp_kallsyms* ; /bin/false ) | |
695 | endef | |
696 | ||
697 | # Update vmlinux version before link | |
698 | # Use + in front of this rule to silent warning about make -j1 | |
72ba47c1 | 699 | # First command is ':' to allow us to use + in front of this rule |
1da177e4 LT |
700 | cmd_ksym_ld = $(cmd_vmlinux__) |
701 | define rule_ksym_ld | |
72ba47c1 | 702 | : |
1da177e4 LT |
703 | +$(call cmd,vmlinux_version) |
704 | $(call cmd,vmlinux__) | |
705 | $(Q)echo 'cmd_$@ := $(cmd_vmlinux__)' > $(@D)/.$(@F).cmd | |
706 | endef | |
707 | ||
708 | # Generate .S file with all kernel symbols | |
709 | quiet_cmd_kallsyms = KSYM $@ | |
710 | cmd_kallsyms = $(NM) -n $< | $(KALLSYMS) \ | |
711 | $(if $(CONFIG_KALLSYMS_ALL),--all-symbols) > $@ | |
712 | ||
713 | .tmp_kallsyms1.o .tmp_kallsyms2.o .tmp_kallsyms3.o: %.o: %.S scripts FORCE | |
714 | $(call if_changed_dep,as_o_S) | |
715 | ||
716 | .tmp_kallsyms%.S: .tmp_vmlinux% $(KALLSYMS) | |
717 | $(call cmd,kallsyms) | |
718 | ||
719 | # .tmp_vmlinux1 must be complete except kallsyms, so update vmlinux version | |
720 | .tmp_vmlinux1: $(vmlinux-lds) $(vmlinux-all) FORCE | |
721 | $(call if_changed_rule,ksym_ld) | |
722 | ||
723 | .tmp_vmlinux2: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms1.o FORCE | |
724 | $(call if_changed,vmlinux__) | |
725 | ||
726 | .tmp_vmlinux3: $(vmlinux-lds) $(vmlinux-all) .tmp_kallsyms2.o FORCE | |
727 | $(call if_changed,vmlinux__) | |
728 | ||
729 | # Needs to visit scripts/ before $(KALLSYMS) can be used. | |
730 | $(KALLSYMS): scripts ; | |
731 | ||
33bc25ea SR |
732 | # Generate some data for debugging strange kallsyms problems |
733 | debug_kallsyms: .tmp_map$(last_kallsyms) | |
734 | ||
735 | .tmp_map%: .tmp_vmlinux% FORCE | |
736 | ($(OBJDUMP) -h $< | $(AWK) '/^ +[0-9]/{print $$4 " 0 " $$2}'; $(NM) $<) | sort > $@ | |
737 | ||
738 | .tmp_map3: .tmp_map2 | |
739 | ||
740 | .tmp_map2: .tmp_map1 | |
741 | ||
1da177e4 LT |
742 | endif # ifdef CONFIG_KALLSYMS |
743 | ||
744 | # vmlinux image - including updated kernel symbols | |
745 | vmlinux: $(vmlinux-lds) $(vmlinux-init) $(vmlinux-main) $(kallsyms.o) FORCE | |
746 | $(call if_changed_rule,vmlinux__) | |
4e25d8bb | 747 | $(Q)rm -f .old_version |
1da177e4 LT |
748 | |
749 | # The actual objects are generated when descending, | |
750 | # make sure no implicit rule kicks in | |
751 | $(sort $(vmlinux-init) $(vmlinux-main)) $(vmlinux-lds): $(vmlinux-dirs) ; | |
752 | ||
753 | # Handle descending into subdirectories listed in $(vmlinux-dirs) | |
754 | # Preset locale variables to speed up the build process. Limit locale | |
755 | # tweaks to this spot to avoid wrong language settings when running | |
756 | # make menuconfig etc. | |
757 | # Error messages still appears in the original language | |
758 | ||
759 | .PHONY: $(vmlinux-dirs) | |
5bb78269 | 760 | $(vmlinux-dirs): prepare scripts |
1da177e4 LT |
761 | $(Q)$(MAKE) $(build)=$@ |
762 | ||
cb58455c SR |
763 | # Build the kernel release string |
764 | # The KERNELRELEASE is stored in a file named .kernelrelease | |
765 | # to be used when executing for example make install or make modules_install | |
766 | # | |
767 | # Take the contents of any files called localversion* and the config | |
768 | # variable CONFIG_LOCALVERSION and append them to KERNELRELEASE. | |
769 | # LOCALVERSION from the command line override all of this | |
770 | ||
771 | nullstring := | |
772 | space := $(nullstring) # end of line | |
773 | ||
774 | ___localver = $(objtree)/localversion* $(srctree)/localversion* | |
775 | __localver = $(sort $(wildcard $(___localver))) | |
776 | # skip backup files (containing '~') | |
777 | _localver = $(foreach f, $(__localver), $(if $(findstring ~, $(f)),,$(f))) | |
778 | ||
779 | localver = $(subst $(space),, \ | |
780 | $(shell cat /dev/null $(_localver)) \ | |
781 | $(patsubst "%",%,$(CONFIG_LOCALVERSION))) | |
782 | ||
783 | # If CONFIG_LOCALVERSION_AUTO is set scripts/setlocalversion is called | |
784 | # and if the SCM is know a tag from the SCM is appended. | |
785 | # The appended tag is determinded by the SCM used. | |
786 | # | |
787 | # Currently, only git is supported. | |
788 | # Other SCMs can edit scripts/setlocalversion and add the appropriate | |
789 | # checks as needed. | |
790 | ifdef CONFIG_LOCALVERSION_AUTO | |
791 | _localver-auto = $(shell $(CONFIG_SHELL) \ | |
792 | $(srctree)/scripts/setlocalversion $(srctree)) | |
793 | localver-auto = $(LOCALVERSION)$(_localver-auto) | |
794 | endif | |
795 | ||
796 | localver-full = $(localver)$(localver-auto) | |
797 | ||
798 | # Store (new) KERNELRELASE string in .kernelrelease | |
2244cbd8 | 799 | kernelrelease = $(KERNELVERSION)$(localver-full) |
cb58455c | 800 | .kernelrelease: FORCE |
2244cbd8 SR |
801 | $(Q)rm -f $@ |
802 | $(Q)echo $(kernelrelease) > $@ | |
cb58455c SR |
803 | |
804 | ||
1da177e4 | 805 | # Things we need to do before we recursively start building the kernel |
5bb78269 SR |
806 | # or the modules are listed in "prepare". |
807 | # A multi level approach is used. prepareN is processed before prepareN-1. | |
808 | # archprepare is used in arch Makefiles and when processed asm symlink, | |
809 | # version.h and scripts_basic is processed / created. | |
1da177e4 | 810 | |
5bb78269 SR |
811 | # Listed in dependency order |
812 | .PHONY: prepare archprepare prepare0 prepare1 prepare2 prepare3 | |
813 | ||
814 | # prepare-all is deprecated, use prepare as valid replacement | |
815 | .PHONY: prepare-all | |
1da177e4 | 816 | |
86feeaa8 | 817 | # prepare3 is used to check if we are building in a separate output directory, |
1da177e4 LT |
818 | # and if so do: |
819 | # 1) Check that make has not been executed in the kernel src $(srctree) | |
820 | # 2) Create the include2 directory, used for the second asm symlink | |
cb58455c | 821 | prepare3: .kernelrelease |
1da177e4 LT |
822 | ifneq ($(KBUILD_SRC),) |
823 | @echo ' Using $(srctree) as source for kernel' | |
d80e2246 | 824 | $(Q)if [ -f $(srctree)/.config ]; then \ |
1da177e4 LT |
825 | echo " $(srctree) is not clean, please run 'make mrproper'";\ |
826 | echo " in the '$(srctree)' directory.";\ | |
827 | /bin/false; \ | |
828 | fi; | |
829 | $(Q)if [ ! -d include2 ]; then mkdir -p include2; fi; | |
830 | $(Q)ln -fsn $(srctree)/include/asm-$(ARCH) include2/asm | |
831 | endif | |
832 | ||
86feeaa8 SR |
833 | # prepare2 creates a makefile if using a separate output directory |
834 | prepare2: prepare3 outputmakefile | |
1da177e4 | 835 | |
86feeaa8 | 836 | prepare1: prepare2 include/linux/version.h include/asm \ |
d80e2246 | 837 | include/config/MARKER |
1da177e4 LT |
838 | ifneq ($(KBUILD_MODULES),) |
839 | $(Q)rm -rf $(MODVERDIR) | |
840 | $(Q)mkdir -p $(MODVERDIR) | |
841 | endif | |
842 | ||
5bb78269 SR |
843 | archprepare: prepare1 scripts_basic |
844 | ||
845 | prepare0: archprepare FORCE | |
8d36a623 | 846 | $(Q)$(MAKE) $(build)=. |
86feeaa8 | 847 | |
1da177e4 | 848 | # All the preparing.. |
5bb78269 | 849 | prepare prepare-all: prepare0 |
1da177e4 LT |
850 | |
851 | # Leave this as default for preprocessing vmlinux.lds.S, which is now | |
852 | # done in arch/$(ARCH)/kernel/Makefile | |
853 | ||
854 | export CPPFLAGS_vmlinux.lds += -P -C -U$(ARCH) | |
855 | ||
856 | # Single targets | |
857 | # --------------------------------------------------------------------------- | |
858 | ||
859 | %.s: %.c scripts FORCE | |
860 | $(Q)$(MAKE) $(build)=$(@D) $@ | |
861 | %.i: %.c scripts FORCE | |
862 | $(Q)$(MAKE) $(build)=$(@D) $@ | |
863 | %.o: %.c scripts FORCE | |
864 | $(Q)$(MAKE) $(build)=$(@D) $@ | |
155ad605 SR |
865 | %.ko: scripts FORCE |
866 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) $(@:.ko=.o) | |
867 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | |
1da177e4 LT |
868 | %/: scripts prepare FORCE |
869 | $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) $(build)=$(@D) | |
870 | %.lst: %.c scripts FORCE | |
871 | $(Q)$(MAKE) $(build)=$(@D) $@ | |
872 | %.s: %.S scripts FORCE | |
873 | $(Q)$(MAKE) $(build)=$(@D) $@ | |
874 | %.o: %.S scripts FORCE | |
875 | $(Q)$(MAKE) $(build)=$(@D) $@ | |
876 | ||
877 | # FIXME: The asm symlink changes when $(ARCH) changes. That's | |
878 | # hard to detect, but I suppose "make mrproper" is a good idea | |
879 | # before switching between archs anyway. | |
880 | ||
881 | include/asm: | |
882 | @echo ' SYMLINK $@ -> include/asm-$(ARCH)' | |
883 | $(Q)if [ ! -d include ]; then mkdir -p include; fi; | |
884 | @ln -fsn asm-$(ARCH) $@ | |
885 | ||
886 | # Split autoconf.h into include/linux/config/* | |
887 | ||
cd05e6bd | 888 | include/config/MARKER: scripts/basic/split-include include/linux/autoconf.h |
1da177e4 LT |
889 | @echo ' SPLIT include/linux/autoconf.h -> include/config/*' |
890 | @scripts/basic/split-include include/linux/autoconf.h include/config | |
891 | @touch $@ | |
892 | ||
893 | # Generate some files | |
894 | # --------------------------------------------------------------------------- | |
895 | ||
896 | # KERNELRELEASE can change from a few different places, meaning version.h | |
897 | # needs to be updated, so this check is forced on all builds | |
898 | ||
899 | uts_len := 64 | |
900 | ||
901 | define filechk_version.h | |
902 | if [ `echo -n "$(KERNELRELEASE)" | wc -c ` -gt $(uts_len) ]; then \ | |
903 | echo '"$(KERNELRELEASE)" exceeds $(uts_len) characters' >&2; \ | |
904 | exit 1; \ | |
905 | fi; \ | |
906 | (echo \#define UTS_RELEASE \"$(KERNELRELEASE)\"; \ | |
907 | echo \#define LINUX_VERSION_CODE `expr $(VERSION) \\* 65536 + $(PATCHLEVEL) \\* 256 + $(SUBLEVEL)`; \ | |
908 | echo '#define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))'; \ | |
909 | ) | |
910 | endef | |
911 | ||
44f329ab | 912 | include/linux/version.h: $(srctree)/Makefile .config .kernelrelease FORCE |
1da177e4 LT |
913 | $(call filechk,version.h) |
914 | ||
915 | # --------------------------------------------------------------------------- | |
916 | ||
917 | .PHONY: depend dep | |
918 | depend dep: | |
919 | @echo '*** Warning: make $@ is unnecessary now.' | |
920 | ||
921 | # --------------------------------------------------------------------------- | |
922 | # Modules | |
923 | ||
924 | ifdef CONFIG_MODULES | |
925 | ||
926 | # By default, build modules as well | |
927 | ||
928 | all: modules | |
929 | ||
930 | # Build modules | |
931 | ||
932 | .PHONY: modules | |
933 | modules: $(vmlinux-dirs) $(if $(KBUILD_BUILTIN),vmlinux) | |
934 | @echo ' Building modules, stage 2.'; | |
935 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | |
936 | ||
937 | ||
938 | # Target to prepare building external modules | |
939 | .PHONY: modules_prepare | |
5bb78269 | 940 | modules_prepare: prepare scripts |
1da177e4 LT |
941 | |
942 | # Target to install modules | |
943 | .PHONY: modules_install | |
944 | modules_install: _modinst_ _modinst_post | |
945 | ||
946 | .PHONY: _modinst_ | |
947 | _modinst_: | |
ce454d4d | 948 | @if [ -z "`$(DEPMOD) -V 2>/dev/null | grep module-init-tools`" ]; then \ |
1da177e4 LT |
949 | echo "Warning: you may need to install module-init-tools"; \ |
950 | echo "See http://www.codemonkey.org.uk/docs/post-halloween-2.6.txt";\ | |
951 | sleep 1; \ | |
952 | fi | |
953 | @rm -rf $(MODLIB)/kernel | |
954 | @rm -f $(MODLIB)/source | |
955 | @mkdir -p $(MODLIB)/kernel | |
956 | @ln -s $(srctree) $(MODLIB)/source | |
957 | @if [ ! $(objtree) -ef $(MODLIB)/build ]; then \ | |
958 | rm -f $(MODLIB)/build ; \ | |
959 | ln -s $(objtree) $(MODLIB)/build ; \ | |
960 | fi | |
961 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst | |
962 | ||
963 | # If System.map exists, run depmod. This deliberately does not have a | |
964 | # dependency on System.map since that would run the dependency tree on | |
965 | # vmlinux. This depmod is only for convenience to give the initial | |
966 | # boot a modules.dep even before / is mounted read-write. However the | |
967 | # boot script depmod is the master version. | |
968 | ifeq "$(strip $(INSTALL_MOD_PATH))" "" | |
969 | depmod_opts := | |
970 | else | |
971 | depmod_opts := -b $(INSTALL_MOD_PATH) -r | |
972 | endif | |
973 | .PHONY: _modinst_post | |
974 | _modinst_post: _modinst_ | |
975 | if [ -r System.map -a -x $(DEPMOD) ]; then $(DEPMOD) -ae -F System.map $(depmod_opts) $(KERNELRELEASE); fi | |
976 | ||
977 | else # CONFIG_MODULES | |
978 | ||
979 | # Modules not configured | |
980 | # --------------------------------------------------------------------------- | |
981 | ||
982 | modules modules_install: FORCE | |
983 | @echo | |
984 | @echo "The present kernel configuration has modules disabled." | |
985 | @echo "Type 'make config' and enable loadable module support." | |
986 | @echo "Then build a kernel with module support enabled." | |
987 | @echo | |
988 | @exit 1 | |
989 | ||
990 | endif # CONFIG_MODULES | |
991 | ||
1da177e4 LT |
992 | ### |
993 | # Cleaning is done on three levels. | |
994 | # make clean Delete most generated files | |
995 | # Leave enough to build external modules | |
996 | # make mrproper Delete the current configuration, and all generated files | |
997 | # make distclean Remove editor backup files, patch leftover files and the like | |
998 | ||
999 | # Directories & files removed with 'make clean' | |
1000 | CLEAN_DIRS += $(MODVERDIR) | |
1001 | CLEAN_FILES += vmlinux System.map \ | |
1002 | .tmp_kallsyms* .tmp_version .tmp_vmlinux* .tmp_System.map | |
1003 | ||
1004 | # Directories & files removed with 'make mrproper' | |
1005 | MRPROPER_DIRS += include/config include2 | |
50aa88e2 | 1006 | MRPROPER_FILES += .config .config.old include/asm .version .old_version \ |
1da177e4 | 1007 | include/linux/autoconf.h include/linux/version.h \ |
cb58455c | 1008 | .kernelrelease Module.symvers tags TAGS cscope* |
1da177e4 LT |
1009 | |
1010 | # clean - Delete most, but leave enough to build external modules | |
1011 | # | |
1012 | clean: rm-dirs := $(CLEAN_DIRS) | |
1013 | clean: rm-files := $(CLEAN_FILES) | |
86feeaa8 | 1014 | clean-dirs := $(addprefix _clean_,$(srctree) $(vmlinux-alldirs)) |
1da177e4 LT |
1015 | |
1016 | .PHONY: $(clean-dirs) clean archclean | |
1017 | $(clean-dirs): | |
1018 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1019 | ||
1020 | clean: archclean $(clean-dirs) | |
1021 | $(call cmd,rmdirs) | |
1022 | $(call cmd,rmfiles) | |
1023 | @find . $(RCS_FIND_IGNORE) \ | |
1024 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | |
1025 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ | |
1026 | -type f -print | xargs rm -f | |
1027 | ||
1028 | # mrproper - Delete all generated files, including .config | |
1029 | # | |
1030 | mrproper: rm-dirs := $(wildcard $(MRPROPER_DIRS)) | |
1031 | mrproper: rm-files := $(wildcard $(MRPROPER_FILES)) | |
1032 | mrproper-dirs := $(addprefix _mrproper_,Documentation/DocBook scripts) | |
1033 | ||
1034 | .PHONY: $(mrproper-dirs) mrproper archmrproper | |
1035 | $(mrproper-dirs): | |
1036 | $(Q)$(MAKE) $(clean)=$(patsubst _mrproper_%,%,$@) | |
1037 | ||
1038 | mrproper: clean archmrproper $(mrproper-dirs) | |
1039 | $(call cmd,rmdirs) | |
1040 | $(call cmd,rmfiles) | |
1041 | ||
1042 | # distclean | |
1043 | # | |
1044 | .PHONY: distclean | |
1045 | ||
1046 | distclean: mrproper | |
1047 | @find $(srctree) $(RCS_FIND_IGNORE) \ | |
1048 | \( -name '*.orig' -o -name '*.rej' -o -name '*~' \ | |
1049 | -o -name '*.bak' -o -name '#*#' -o -name '.*.orig' \ | |
1050 | -o -name '.*.rej' -o -size 0 \ | |
1051 | -o -name '*%' -o -name '.*.cmd' -o -name 'core' \) \ | |
1052 | -type f -print | xargs rm -f | |
1053 | ||
1054 | ||
1055 | # Packaging of the kernel to various formats | |
1056 | # --------------------------------------------------------------------------- | |
1057 | # rpm target kept for backward compatibility | |
1058 | package-dir := $(srctree)/scripts/package | |
1059 | ||
1060 | .PHONY: %-pkg rpm | |
1061 | ||
1062 | %pkg: FORCE | |
1063 | $(Q)$(MAKE) -f $(package-dir)/Makefile $@ | |
1064 | rpm: FORCE | |
1065 | $(Q)$(MAKE) -f $(package-dir)/Makefile $@ | |
1066 | ||
1067 | ||
1068 | # Brief documentation of the typical targets used | |
1069 | # --------------------------------------------------------------------------- | |
1070 | ||
1071 | boards := $(wildcard $(srctree)/arch/$(ARCH)/configs/*_defconfig) | |
1072 | boards := $(notdir $(boards)) | |
1073 | ||
1074 | help: | |
1075 | @echo 'Cleaning targets:' | |
1076 | @echo ' clean - remove most generated files but keep the config' | |
1077 | @echo ' mrproper - remove all generated files + config + various backup files' | |
1078 | @echo '' | |
1079 | @echo 'Configuration targets:' | |
1080 | @$(MAKE) -f $(srctree)/scripts/kconfig/Makefile help | |
1081 | @echo '' | |
1082 | @echo 'Other generic targets:' | |
1083 | @echo ' all - Build all targets marked with [*]' | |
1084 | @echo '* vmlinux - Build the bare kernel' | |
1085 | @echo '* modules - Build all modules' | |
9cc5d74c | 1086 | @echo ' modules_install - Install all modules to INSTALL_MOD_PATH (default: /)' |
1da177e4 LT |
1087 | @echo ' dir/ - Build all files in dir and below' |
1088 | @echo ' dir/file.[ois] - Build specified target only' | |
155ad605 | 1089 | @echo ' dir/file.ko - Build module including final link' |
1da177e4 LT |
1090 | @echo ' rpm - Build a kernel as an RPM package' |
1091 | @echo ' tags/TAGS - Generate tags file for editors' | |
1092 | @echo ' cscope - Generate cscope index' | |
6d128842 | 1093 | @echo ' kernelrelease - Output the release version string' |
cb58455c | 1094 | @echo ' kernelversion - Output the version stored in Makefile' |
1da177e4 LT |
1095 | @echo '' |
1096 | @echo 'Static analysers' | |
1097 | @echo ' buildcheck - List dangling references to vmlinux discarded sections' | |
1098 | @echo ' and init sections from non-init sections' | |
1099 | @echo ' checkstack - Generate a list of stack hogs' | |
1100 | @echo ' namespacecheck - Name space analysis on compiled kernel' | |
1101 | @echo '' | |
1102 | @echo 'Kernel packaging:' | |
1103 | @$(MAKE) -f $(package-dir)/Makefile help | |
1104 | @echo '' | |
1105 | @echo 'Documentation targets:' | |
1106 | @$(MAKE) -f $(srctree)/Documentation/DocBook/Makefile dochelp | |
1107 | @echo '' | |
1108 | @echo 'Architecture specific targets ($(ARCH)):' | |
1109 | @$(if $(archhelp),$(archhelp),\ | |
1110 | echo ' No architecture specific help defined for $(ARCH)') | |
1111 | @echo '' | |
1112 | @$(if $(boards), \ | |
1113 | $(foreach b, $(boards), \ | |
1114 | printf " %-24s - Build for %s\\n" $(b) $(subst _defconfig,,$(b));) \ | |
1115 | echo '') | |
1116 | ||
1117 | @echo ' make V=0|1 [targets] 0 => quiet build (default), 1 => verbose build' | |
1118 | @echo ' make O=dir [targets] Locate all output files in "dir", including .config' | |
1119 | @echo ' make C=1 [targets] Check all c source with $$CHECK (sparse)' | |
1120 | @echo ' make C=2 [targets] Force check of all c source with $$CHECK (sparse)' | |
1121 | @echo '' | |
1122 | @echo 'Execute "make" or "make all" to build all targets marked with [*] ' | |
1123 | @echo 'For further info see the ./README file' | |
1124 | ||
1125 | ||
1126 | # Documentation targets | |
1127 | # --------------------------------------------------------------------------- | |
1128 | %docs: scripts_basic FORCE | |
1129 | $(Q)$(MAKE) $(build)=Documentation/DocBook $@ | |
1130 | ||
1131 | else # KBUILD_EXTMOD | |
1132 | ||
1133 | ### | |
1134 | # External module support. | |
1135 | # When building external modules the kernel used as basis is considered | |
1136 | # read-only, and no consistency checks are made and the make | |
1137 | # system is not used on the basis kernel. If updates are required | |
1138 | # in the basis kernel ordinary make commands (without M=...) must | |
1139 | # be used. | |
1140 | # | |
1141 | # The following are the only valid targets when building external | |
1142 | # modules. | |
1143 | # make M=dir clean Delete all automatically generated files | |
1144 | # make M=dir modules Make all modules in specified dir | |
1145 | # make M=dir Same as 'make M=dir modules' | |
1146 | # make M=dir modules_install | |
1147 | # Install the modules build in the module directory | |
1148 | # Assumes install directory is already created | |
1149 | ||
1150 | # We are always building modules | |
1151 | KBUILD_MODULES := 1 | |
1152 | .PHONY: crmodverdir | |
1153 | crmodverdir: | |
1154 | $(Q)mkdir -p $(MODVERDIR) | |
1155 | ||
1156 | .PHONY: $(objtree)/Module.symvers | |
1157 | $(objtree)/Module.symvers: | |
1158 | @test -e $(objtree)/Module.symvers || ( \ | |
1159 | echo; \ | |
1160 | echo " WARNING: Symbol version dump $(objtree)/Module.symvers"; \ | |
1161 | echo " is missing; modules will have no dependencies and modversions."; \ | |
1162 | echo ) | |
1163 | ||
1164 | module-dirs := $(addprefix _module_,$(KBUILD_EXTMOD)) | |
1165 | .PHONY: $(module-dirs) modules | |
1166 | $(module-dirs): crmodverdir $(objtree)/Module.symvers | |
1167 | $(Q)$(MAKE) $(build)=$(patsubst _module_%,%,$@) | |
1168 | ||
1169 | modules: $(module-dirs) | |
1170 | @echo ' Building modules, stage 2.'; | |
1171 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modpost | |
1172 | ||
1173 | .PHONY: modules_install | |
1174 | modules_install: | |
1175 | $(Q)$(MAKE) -rR -f $(srctree)/scripts/Makefile.modinst | |
1176 | ||
1177 | clean-dirs := $(addprefix _clean_,$(KBUILD_EXTMOD)) | |
1178 | ||
1179 | .PHONY: $(clean-dirs) clean | |
1180 | $(clean-dirs): | |
1181 | $(Q)$(MAKE) $(clean)=$(patsubst _clean_%,%,$@) | |
1182 | ||
1183 | clean: rm-dirs := $(MODVERDIR) | |
1184 | clean: $(clean-dirs) | |
1185 | $(call cmd,rmdirs) | |
1186 | @find $(KBUILD_EXTMOD) $(RCS_FIND_IGNORE) \ | |
1187 | \( -name '*.[oas]' -o -name '*.ko' -o -name '.*.cmd' \ | |
1188 | -o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \) \ | |
1189 | -type f -print | xargs rm -f | |
1190 | ||
1191 | help: | |
1192 | @echo ' Building external modules.' | |
1193 | @echo ' Syntax: make -C path/to/kernel/src M=$$PWD target' | |
1194 | @echo '' | |
1195 | @echo ' modules - default target, build the module(s)' | |
1196 | @echo ' modules_install - install the module' | |
1197 | @echo ' clean - remove generated files in module directory only' | |
1198 | @echo '' | |
1199 | endif # KBUILD_EXTMOD | |
1200 | ||
1201 | # Generate tags for editors | |
1202 | # --------------------------------------------------------------------------- | |
1203 | ||
1204 | #We want __srctree to totally vanish out when KBUILD_OUTPUT is not set | |
1205 | #(which is the most common case IMHO) to avoid unneeded clutter in the big tags file. | |
1206 | #Adding $(srctree) adds about 20M on i386 to the size of the output file! | |
1207 | ||
f182ae62 | 1208 | ifeq ($(src),$(obj)) |
1da177e4 LT |
1209 | __srctree = |
1210 | else | |
1211 | __srctree = $(srctree)/ | |
1212 | endif | |
1213 | ||
2ab23c95 PBG |
1214 | ifeq ($(ALLSOURCE_ARCHS),) |
1215 | ifeq ($(ARCH),um) | |
1216 | ALLINCLUDE_ARCHS := $(ARCH) $(SUBARCH) | |
1217 | else | |
1218 | ALLINCLUDE_ARCHS := $(ARCH) | |
1219 | endif | |
1220 | else | |
1221 | #Allow user to specify only ALLSOURCE_PATHS on the command line, keeping existing behaviour. | |
1222 | ALLINCLUDE_ARCHS := $(ALLSOURCE_ARCHS) | |
1223 | endif | |
1224 | ||
a0674e88 IC |
1225 | ALLSOURCE_ARCHS := $(ARCH) |
1226 | ||
1da177e4 LT |
1227 | define all-sources |
1228 | ( find $(__srctree) $(RCS_FIND_IGNORE) \ | |
1229 | \( -name include -o -name arch \) -prune -o \ | |
1230 | -name '*.[chS]' -print; \ | |
a0674e88 IC |
1231 | for ARCH in $(ALLSOURCE_ARCHS) ; do \ |
1232 | find $(__srctree)arch/$${ARCH} $(RCS_FIND_IGNORE) \ | |
1233 | -name '*.[chS]' -print; \ | |
1234 | done ; \ | |
1da177e4 LT |
1235 | find $(__srctree)security/selinux/include $(RCS_FIND_IGNORE) \ |
1236 | -name '*.[chS]' -print; \ | |
1237 | find $(__srctree)include $(RCS_FIND_IGNORE) \ | |
1238 | \( -name config -o -name 'asm-*' \) -prune \ | |
1239 | -o -name '*.[chS]' -print; \ | |
2ab23c95 | 1240 | for ARCH in $(ALLINCLUDE_ARCHS) ; do \ |
a0674e88 IC |
1241 | find $(__srctree)include/asm-$${ARCH} $(RCS_FIND_IGNORE) \ |
1242 | -name '*.[chS]' -print; \ | |
1243 | done ; \ | |
1da177e4 LT |
1244 | find $(__srctree)include/asm-generic $(RCS_FIND_IGNORE) \ |
1245 | -name '*.[chS]' -print ) | |
1246 | endef | |
1247 | ||
1248 | quiet_cmd_cscope-file = FILELST cscope.files | |
acbef459 | 1249 | cmd_cscope-file = (echo \-k; echo \-q; $(all-sources)) > cscope.files |
1da177e4 LT |
1250 | |
1251 | quiet_cmd_cscope = MAKE cscope.out | |
acbef459 | 1252 | cmd_cscope = cscope -b |
1da177e4 LT |
1253 | |
1254 | cscope: FORCE | |
1255 | $(call cmd,cscope-file) | |
1256 | $(call cmd,cscope) | |
1257 | ||
1258 | quiet_cmd_TAGS = MAKE $@ | |
66d609ec SR |
1259 | define cmd_TAGS |
1260 | rm -f $@; \ | |
54e08a23 ST |
1261 | ETAGSF=`etags --version | grep -i exuberant >/dev/null && \ |
1262 | echo "-I __initdata,__exitdata,__acquires,__releases \ | |
1263 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ | |
1264 | --extra=+f --c-kinds=+px"`; \ | |
f6333eb4 | 1265 | $(all-sources) | xargs etags $$ETAGSF -a |
66d609ec SR |
1266 | endef |
1267 | ||
1268 | TAGS: FORCE | |
1269 | $(call cmd,TAGS) | |
1da177e4 | 1270 | |
1da177e4 LT |
1271 | |
1272 | quiet_cmd_tags = MAKE $@ | |
1273 | define cmd_tags | |
1274 | rm -f $@; \ | |
54e08a23 ST |
1275 | CTAGSF=`ctags --version | grep -i exuberant >/dev/null && \ |
1276 | echo "-I __initdata,__exitdata,__acquires,__releases \ | |
1277 | -I EXPORT_SYMBOL,EXPORT_SYMBOL_GPL \ | |
1278 | --extra=+f --c-kinds=+px"`; \ | |
f6333eb4 | 1279 | $(all-sources) | xargs ctags $$CTAGSF -a |
1da177e4 LT |
1280 | endef |
1281 | ||
1da177e4 LT |
1282 | tags: FORCE |
1283 | $(call cmd,tags) | |
1284 | ||
1285 | ||
1286 | # Scripts to check various things for consistency | |
1287 | # --------------------------------------------------------------------------- | |
1288 | ||
1da177e4 LT |
1289 | includecheck: |
1290 | find * $(RCS_FIND_IGNORE) \ | |
1291 | -name '*.[hcS]' -type f -print | sort \ | |
1292 | | xargs $(PERL) -w scripts/checkincludes.pl | |
1293 | ||
1294 | versioncheck: | |
1295 | find * $(RCS_FIND_IGNORE) \ | |
1296 | -name '*.[hcS]' -type f -print | sort \ | |
1297 | | xargs $(PERL) -w scripts/checkversion.pl | |
1298 | ||
1299 | buildcheck: | |
1300 | $(PERL) $(srctree)/scripts/reference_discarded.pl | |
1301 | $(PERL) $(srctree)/scripts/reference_init.pl | |
1302 | ||
1303 | namespacecheck: | |
1304 | $(PERL) $(srctree)/scripts/namespace.pl | |
1305 | ||
1306 | endif #ifeq ($(config-targets),1) | |
1307 | endif #ifeq ($(mixed-targets),1) | |
1308 | ||
1309 | .PHONY: checkstack | |
1310 | checkstack: | |
1311 | $(OBJDUMP) -d vmlinux $$(find . -name '*.ko') | \ | |
1312 | $(PERL) $(src)/scripts/checkstack.pl $(ARCH) | |
1313 | ||
1314 | kernelrelease: | |
2244cbd8 SR |
1315 | $(if $(wildcard .kernelrelease), $(Q)echo $(KERNELRELEASE), \ |
1316 | $(error kernelrelease not valid - run 'make *config' to update it)) | |
cb58455c | 1317 | kernelversion: |
2244cbd8 | 1318 | @echo $(KERNELVERSION) |
1da177e4 LT |
1319 | |
1320 | # FIXME Should go into a make.lib or something | |
1321 | # =========================================================================== | |
1322 | ||
1323 | quiet_cmd_rmdirs = $(if $(wildcard $(rm-dirs)),CLEAN $(wildcard $(rm-dirs))) | |
1324 | cmd_rmdirs = rm -rf $(rm-dirs) | |
1325 | ||
1326 | quiet_cmd_rmfiles = $(if $(wildcard $(rm-files)),CLEAN $(wildcard $(rm-files))) | |
1327 | cmd_rmfiles = rm -f $(rm-files) | |
1328 | ||
1329 | ||
1330 | a_flags = -Wp,-MD,$(depfile) $(AFLAGS) $(AFLAGS_KERNEL) \ | |
1331 | $(NOSTDINC_FLAGS) $(CPPFLAGS) \ | |
1332 | $(modkern_aflags) $(EXTRA_AFLAGS) $(AFLAGS_$(*F).o) | |
1333 | ||
1334 | quiet_cmd_as_o_S = AS $@ | |
1335 | cmd_as_o_S = $(CC) $(a_flags) -c -o $@ $< | |
1336 | ||
1337 | # read all saved command lines | |
1338 | ||
1339 | targets := $(wildcard $(sort $(targets))) | |
1340 | cmd_files := $(wildcard .*.cmd $(foreach f,$(targets),$(dir $(f)).$(notdir $(f)).cmd)) | |
1341 | ||
1342 | ifneq ($(cmd_files),) | |
1343 | $(cmd_files): ; # Do not try to update included dependency files | |
1344 | include $(cmd_files) | |
1345 | endif | |
1346 | ||
1da177e4 LT |
1347 | # Shorthand for $(Q)$(MAKE) -f scripts/Makefile.clean obj=dir |
1348 | # Usage: | |
1349 | # $(Q)$(MAKE) $(clean)=dir | |
1350 | clean := -f $(if $(KBUILD_SRC),$(srctree)/)scripts/Makefile.clean obj | |
1351 | ||
1da177e4 LT |
1352 | endif # skip-makefile |
1353 | ||
1354 | FORCE: |